Idk why I cant manage to get my pull ups. I enlisted in January and im leaving in 2 1/2 months and I can only manage 1 pull up! I can easily do over 100 crunches and my run is 13:22 atm (first IST was 18+). Im 6 foot 2 and about 225. I bought a pull up strap and that has helped alot. Actually one day at PT I did about 60 pull ups with my strap, not all at once but before, during and after and its about 75 pounds of assistance. Is there another exercise I can do to help build up the muscle or am I just a fat body and need to loose more weight? Please no hate responses, just help!